掺La铁酸铋粉体的晶体结构  

Crystal structure of La doping BiFeO_3 powders

作　　者：戚梦瑶[1] 朱克荣[1,2] 黄传喜[1] 吕飒音[2] 

机构地区：[1]安徽大学物理与材料科学学院,安徽合肥230039 [2]安徽大学现代实验技术中心,安徽合肥230039

出　　处：《安徽大学学报（自然科学版）》2011年第6期54-59,共6页Journal of Anhui University(Natural Science Edition)

基　　金：安徽大学人才队伍建设基金资助项目(02203105)

摘　　要：用溶胶凝胶法成功制备Bi1-xLaxFeO3(BLFO,x=0.00～0.40)粉体样品,用X射线衍射谱和拉曼光谱表征样品的结构,并用Rietveld精修法拟合样品的XRD谱.结果显示随着掺La量x的增加,晶格常数逐渐减小,晶胞体积线性减小,当掺杂量增加到x=0.30时,BLFO粉体样品的晶体结构由R3c的三角相转变为Amn2的正交相结构.Bi1-xLaxFeO3（BLFO,x= 0.00~0.40）powders were prepared by a sol-gel process and characterized by X-ray diffraction（XRD） and Raman scattering.The XRD data of sample was fitted by the Rietveld refinement.Results showed that the lattice constants and cell volume decreased with the La content x increasing,and the crystal structure transformed from the R3c rhombohedra to the Amn2 orthorhombic with the La content x increasing to 0.30.

关 键 词：铁酸铋 X射线衍射 RIETVELD精修 拉曼散射 相变 

分 类 号：O766[理学—晶体学]